Furnace construction



A1182 25, l931'- l.. H. HosBElN 1,820,664

FURNACE CONSTRUCTION Filed oct. 1o. 1927 2 snags-sheen 1 III xl Il l '1Patented Aug. 25, 1931 lUNrrlazn STATES lPNN-:rrr OFFICE LOUIS H.HOSEIN, OF WINNETKA, ILLINOIS, ASSIGNOR TO M. H. DIETRICH COMPANY, i

F CHICAGO, ILLINOIS, A CORPORATION-OF ILLINOIS FURNACE CONSTRUCTION yApplication filed October 10, 1927. Serial No. 225,186.

Thisinvention relates to furnace construcstanding of the invention orits employment` tion, particularly to the construction of the furnacechamber. While not` limited thereto, it is-particularly adapted forembodiment in yfurnace wall constructions and will be explained byreference to an illustrative em,- bodiment in a furnace wall. It relatesto the form of furnace construction in which the furnace closure, suchasa wall, is of the aircooled type, that is, a construction in whichprovision is made for the circulation of air over the fxterior surfacesof the refractories for the purpose of preventing their becoming heatedto an undesirably high temperature.

The general objectA of the invention is the provision of a constructionwherein air-circulating lanes may be formed by members Iwhich functionalso to support and hold in place the refractories which form thefurnace a@ chamber.

Another object is the provision of a construction which will contributeto rapid dissipation of excessive heat from the furnace refractories,the heat-removing effect being susceptible of control.

' Another object is the provision of construction for providing verticalair lanes in a furnace-wall structure ofthe suspended type withoutsubstantial increasepin cost and without imposing limitations on theflexibility of the wall or facility of repair.

Another object is the provision of a' construction for providingvertical air lanes in a furnace wall of the suspended type withoutinvolving exposure of the wall-support ing frame members to undesirablyhigh temperatures.

Another object is the provision of aconstruction for suspended furnacewalls with vertical air lanes which involves the use of a minimum numberof differentlyT shaped parts.

, Yet another object is the provision of'such construction which may beeasily and quickly installed and which is susceptible of use in a greatvariety of furnace chambers.

Other and further objects will be pointed out or indicated hereinafteror Will be apparent to one skilled in the art upon an underin practice.

In the accompanying drawings is illustrated furnace wall constructionembodying the invention, and certain forms of structural elementsemployed therein, but it is to be understood that these are allpresented simply by way of example, as an aid in explaining theinvention, and that they are not to be construed in any fashion such asto limit the Aappended claims short of the true and more comprehensivescope of the inventionl in the art.

In said drawings Fig. 1 is a part sectional elevation of a furnaceshowing the interior elevation of a part of one wall, same having someof the refractories removed to show supporting members,

and a conjoining wall in vertical section,

' which section -corresponds to one taken on the line A-A of the ligure.

Fig. 2 is another transverse vertical section of the wall structure, ason the line 2-2 of Fig. 1 and Fig. 3 is a detail in perspectiveillustrating the form and assembly of certain of the structuralelements. Y ln the examples illustrated inthe drawings, the invention isdisclosed as embodied in a furnace wall construction of a sectionalsuspended type suchas 1s described in detail and claimed in the U. S.patent to Raymondl D. Foltz, No. 1,7 47,822. In suchv a construction thewall is carried on a frame which includes column members 10, rangedalongtlie line of the Wall and suitably supported,x and transversemembers 11 which connect the sevy p eral columns 10, said transversemembers 11 being spaced from one another at appropriate intervalslongitudinally ofthe members 10. The refractory wall, which forms partofthe furnace chamber, is made up of a plurality of horizontally runningzones, disp oscd above one another, as herein designated by thereference characters 12, with cxpan'sion joints 13 between the zones forac` commodating their expansion without sub- `jecting one another tocompression. "lhe several zones are in turn made up of sections, each ofwhich comprises a plurality of refractories 14 supported on certain ofthe transverse members 11 by means of a hanger 4which retains therefractories in place and spaces their outer ends from the frame members11 and 10. Uponthe frame members 11 are supported the sections 15 of anexte- I rior or sheathing wall which is spaced from -the outer surfaceof the refractory Wall to -be exercised, Within limits, of thetemperature of the refractory wall. To this purpose,

' l provide supporting elements 16 which may be formed most convenientlyas iron castings, and which are adapted to support Wall sections, asbest seen in Fig. 3, each'of these supporting elements comprising a bodyportion 16a inthe form of a plate which is of suflicient Width to spanthe space between the furnace wall and the'sheathing wall 15. At

its top and outer side the body portion carv-` ries a hook 16b adaptedto engage over Va flange on a transverse frame member 11, as illustratedin Fig. 1, and at its bottom and inner side the body portion is formedwith a foot portion 16C` adapted to bear upon the inner side of a framemember 11. For a part of its length the body portion 16a is of greaterwidth. thanthe air space, and along the margin of lsaid wider portionis.provided' .with the laterally directed flanges 16d, which terminateat their lower end at a shelf 16e. At lits top and bottom edges the bodyportion is provided with the parallel lugs or fianges 16t which arespaced apart in the direction of the thickness of the plate 16a. Theshelf 16 is adapted to supporta stack of refractories 14 which haveanchoring engagement with the flanges 16d through the medium ofT-s'haped slots formed in the outer ends of the refractories, saidrefractories being slid onto the flanges' 16d from the top of thelatter. In the assembly of the structure these supporting elements 16are disposed at appropriate intervals in the length of the wall, beingsupported on the frame members `-11 as above described. The wallsections between those-carried on these supporting elements aresimilarly supported on hangers 17, but which hangers, excepting fortheir supporting arms -17a at top and bottom, extend for only a limiteddistance into the air space between the vrefractories and sheathingwalls. The hangers 17 of a given zone 4are disposed in staggeredrelationship to those of superjacent and subjacent'zones, so

taken from the boiler .conducted by the conduit 22 against shiftinglaterally olf of the suppoi. t-

ing elements. In conjunction with the body portions 16a of thesupporting elements, therefore, these partition plates 18 form con'-tinuous vertically running partitions disposed at intervals along thewall and subdividing the air space into vertically running lanes.titions are designated by the reference character P. The partitionplates 18 preferably are of such width to extend a shqrt distance intothe vertical joint between the sections adjacent them, which sections,as above pointed out, are supported on hangers that are displacedlaterally from the supporting elements by the distance of one half asection width. By virtue of this contact of the ln Fig. 1 the locationsof these parpartition plates with the refract-ories, as is .i

also the case With the supporting elements 16, heat is transferred fromthe refractories to these metallic members by conduction, andtransferred from them to the contacting air quite rapidly, by virtue ofthe extensive surface exposure'of the plates and supporting elementsWithin the air space..

At top and bottom, the vertical air lanes are in communication, throughsuitable openings 19 and 2O in the outer wall, with conduits 21 and 22,or other sources of air supply and disposal, so that air may enter atthe lower portions of the lanes and flow out at the upper port-ions,thus maintaining a continuous stream of air passing up across the outerfaces of the refractories and about the hangers and along the partitionplates and supporting elements 16. This air may be room, or it may befrom a preheater in the stack, and it may be `utilized for supportingcombustion in the furnace and for the injection of pulverized or liquidfuel, the heat which it has taken up in its 1n the furnace. may becontrolledtby suitable dampers 24 so that the quantity of air passingthrough the lanes may be regulated, as to obtain a rapid How forprotecting the refractories lio A passage through the lanes being thusutilized The air openings 19 and 20' suspended on suitably formedhangers, to accommodate openings 26 for inspection doors or fuel-feedingdevices.

In addition to the control of the air flow, which the invention makespossible as above described, it attains the furthei` importantvv ieffect of securing full distribution of the air over the entire outersurface of the refractory wall, thus preventing the short-circuitmg ofthe flow in such fashion as' to leave dead spacesv in which air mightstagnate and become heated to a degree detrimental tothe refractories orportions of the supporting structure. It will be observed', moreover,

` that the subdivision of the airspace is accomplishedvin a very simplemanner, so far as the structure is concerned, and by use of duplicateand interchangeable elements, as the supporting elements 16 may be ofuniform size and pattern and the' partition plates 18 limited to onlyone or two different lengths. The assembly of the structure is a verysimpleproceedmg, asis also the replacement of any of the refractories,hangers or supporting elements in theI event repair mum. A furtherimportant advantage resides-in the fact that the lane-forming partitionsdo not blanket any of the refractory Wall or prevent access of thecirculating air to any portion of its area but, to the contrary,effectively contribute to the transfer of heat from the refraetories tothetemperattire-controlling air in the lanes.

l/Vhat I claim is: .v ,i l. In furnace construction, the combinag tionwith a sectionally -supported wall, of

an exterior Wall spaced therefrom to afford an intervening air space,supporting ele ments supporting respective sections of the refractoryWall and partition members cooperating with vertically spaced supportingelements to subdivide the air space into separate lanes.

2. In furnaceconstruction, the combinai tion with a supporting frame, ofa sectional refractory wall, an exterior Wall spaced from the.refractory Wall to afford an 'intervening air space, and supportingelements carried by the frame and supporting refractory wall sections,and'partition members cooperating with vertically spaced supportingelements to subdivide the air space into parallel separate lanes.

,f 3. In furnace construction, theicombination with a supporting frame,of an exterior Wall carried on the frame, a sectional refractory wallspaced from the exterior Wall and frame to afford an intervening airspace,

supportingy elements carried on the frame and supporting sections oftherefractory Wall, and partition members engaged with vertically spacedsupportinfr element: and cooperating therewith to sutbdivide the airspace into separate air lanes.

v4. In furnace construction, the combination With a supporting frame, ofa refractory Wall composed of sections one above another, an exteriorWall spaced from the refractory Wall to afford an intervening air space,supporting elements, supporting the refractory Wall sections from theframe, and partition members carried by vertically aligned supportingelements and cooperating therewith .to subdivide the airspace intoseparate vertical air lanes.'

5. In furnace construction, the lcombination' with a frame, of arefractory Wall, an exterior wall spaced therefrom to affdrd anintervening air space, supporting members suspended on the frame andsupporting portions of the refractory Wall, certain of said supportingmembers provided with plates extending aeroi's the air space betweensaid Walls.

6. In furnace construction, the combination with a sectional refractoryWall, of an A exterior Wall spaced therefrom to afford an interveningair space,.and supporting menibers interlocked with and supportingsections lof the refractory wall one above another, certain' of saidsupi'nortimgg'` members being aligned vertically and provided Withplates forming vertical partitions between portions of the air space.

7. In furnace construction, the combination ofa refractory wall, anexterior Wall spaced therefrom to afford an intervening air space,hangers supporting the refractory wvall, and partitions subdividing theair space into separate vertical air lanes,I said partitions formed inpart by portions of certain of the hangers. 'f

8. In furnace construction, the combination of a frame, an exteriorWall, a refractory Wall supported by the frame and spaced therefrom andfrom the exterior Wall -to yafford an intervening air space, andpartitions shiftably supported on the frame and subdividing the airspace into separate vertical air lanes. v I

9. In furnace construction, in combination, a refractory wall', anexterior Wall spaced therefrom to afford an intervening air space, aframe spaced from the refractory wall` and partition members shiftablysupported on the frame and extending into the refractory wall for only afraction of its thickness and subdividing the air space into air lane-"l0. In furnace construction, in combination, a refractory Wall, anexterior Wall space-d therefrom to affordan intervening air space, aframe, and metallic partition vmembers supported on the frame and eX-lio .tending into the refractory Wall and subdividing the air space intolanes in which the surfaces of the `partition members are eX- posed.

11. In furnace construction, in combination, an exterior wall, arefractory iwall' spaced therefrom to afford, an intervening air space,said Walls being movable relative to each other for accommodation of eX-pansion, and metallic members extending 'from the exterior wall into therefractory wall and subdividing the air space into seg regatedair lanes,said metallic members llaving areas exposed in the air lanes for coolingeffect.

12. A structure as specified in claim 10 and in which the air lanes areprovided with inlets and ontletf for air.

13. A structure 41s specified in claim 8 and Ain which the air lanes areprovided with air inlets and outlets at respective ends.

14. A structure as specified in claim 4 and in which the air lanes areprovided with air outlets and inlets at top and bottom.

lUIn furnace construction, a furnace chamber Wall and a sheathing Wallaffording an intervening air chamber, and partition members partiallyembedded in the furnace chamber wall and subdividing the air chamberinto separate air lanes, the exterior snrfaces of the furnace chamberWall being entirely exposed in said air lanes.

' 16. In a furnace structure, in combination, a sectional furnacechamber Wall, a sheathing Wall spaced therefrom to afford an airchamber, a frame spaced from the furnace chamber Wall, supportingTelements whereby the furnace chamber Wall sections are supported on theframe, said supporting elements being arranged in horizontal rows atdifferent elevations, and partition menibers cooperating with supportingelements in different rows to subdividel the air chamber into verticallyrunning air lanes.

In testimony whereof I have hereunto subscribed my name.

LOUIS H. HOSBEIN.

